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resource.go
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resource.go
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package v2action
import (
"archive/zip"
"crypto/sha1"
"fmt"
"io"
"io/ioutil"
"os"
"path/filepath"
"code.cloudfoundry.org/cli/api/cloudcontroller/ccv2"
log "github.com/Sirupsen/logrus"
)
type FileChangedError struct {
Filename string
}
func (e FileChangedError) Error() string {
return fmt.Sprint("SHA1 mismatch for:", e.Filename)
}
type Resource ccv2.Resource
// GatherResources returns a list of resources for a directory.
func (_ Actor) GatherResources(sourceDir string) ([]Resource, error) {
var resources []Resource
walkErr := filepath.Walk(sourceDir, func(path string, info os.FileInfo, err error) error {
if err != nil {
return err
}
relPath, err := filepath.Rel(sourceDir, path)
if err != nil {
return err
}
if relPath == "." {
return nil
}
resource := Resource{
Filename: filepath.ToSlash(relPath),
}
if !info.IsDir() {
resource.Size = info.Size()
resource.Mode = fixMode(info.Mode())
file, err := os.Open(path)
if err != nil {
return err
}
defer file.Close()
sum := sha1.New()
_, err = io.Copy(sum, file)
if err != nil {
return err
}
resource.SHA1 = fmt.Sprintf("%x", sum.Sum(nil))
}
resources = append(resources, resource)
return nil
})
return resources, walkErr
}
// ZipResources zips a directory and a sorted (based on full path/filename)
// list of resources and returns the location. On Windows, the filemode for
// user is forced to be readable and executable.
func (actor Actor) ZipResources(sourceDir string, filesToInclude []Resource) (string, error) {
log.WithField("sourceDir", sourceDir).Info("zipping source files")
zipFile, err := ioutil.TempFile("", "cf-cli-")
if err != nil {
return "", err
}
defer zipFile.Close()
writer := zip.NewWriter(zipFile)
defer writer.Close()
for _, resource := range filesToInclude {
fullPath := filepath.Join(sourceDir, resource.Filename)
log.WithField("fullPath", fullPath).Debug("zipping file")
err := actor.addFileToZip(fullPath, resource.Filename, resource.SHA1, writer)
if err != nil {
log.WithField("fullPath", fullPath).Errorln("zipping file:", err)
return "", err
}
}
log.WithFields(log.Fields{
"zip_file_location": zipFile.Name(),
"zipped_file_count": len(filesToInclude),
}).Info("zip file created")
return zipFile.Name(), nil
}
func (_ Actor) actorToCCResources(resources []Resource) []ccv2.Resource {
apiResources := make([]ccv2.Resource, 0, len(resources)) // Explicitly done to prevent nils
for _, resource := range resources {
apiResources = append(apiResources, ccv2.Resource(resource))
}
return apiResources
}
func (_ Actor) addFileToZip(srcPath string, destPath string, sha1Sum string, zipFile *zip.Writer) error {
srcFile, err := os.Open(srcPath)
if err != nil {
log.WithField("srcPath", srcPath).Errorln("opening path in dir:", err)
return err
}
defer srcFile.Close()
fileInfo, err := srcFile.Stat()
if err != nil {
log.WithField("srcPath", srcPath).Errorln("stat error in dir:", err)
return err
}
header, err := zip.FileInfoHeader(fileInfo)
if err != nil {
log.WithField("srcPath", srcPath).Errorln("getting file info in dir:", err)
return err
}
// An extra '/' indicates that this file is a directory
if fileInfo.IsDir() {
destPath += "/"
}
header.Name = destPath
header.Method = zip.Deflate
mode := fixMode(fileInfo.Mode())
header.SetMode(mode)
log.WithFields(log.Fields{
"srcPath": srcPath,
"destPath": destPath,
"mode": mode,
}).Debug("setting mode for file")
destFileWriter, err := zipFile.CreateHeader(header)
if err != nil {
log.Errorln("creating header:", err)
return err
}
if !fileInfo.IsDir() {
sum := sha1.New()
multi := io.MultiWriter(sum, destFileWriter)
if _, err := io.Copy(multi, srcFile); err != nil {
log.WithField("srcPath", srcPath).Errorln("copying data in dir:", err)
return err
}
if sha1Sum != fmt.Sprintf("%x", sum.Sum(nil)) {
return FileChangedError{Filename: srcPath}
}
}
return nil
}